1834 - Thomas Davenport of Vermont developed the first real electric motor ('real' meaning powerful enough to do a task) although Joseph Henry and Michael Faraday created early motion devices using electromagnetic fields.
Below is a more detailed usage of operating systems according to age group: 18 to 34 years old. Of all the smartphone users, 50% use Android as operating system, 43% use iPhone, 39% use Microsoft and 38% use RIM. Apparently, more users prefer Android.
A category for 14 year-olds was also introduced, and the lowest age rating was dropped from 4 years of age to 3. The categories are the following: 1  Para todos os publicos â PÃºblicos for all the (public especially designed for children under 3 years of).  age